(6 points) Suppose test scores are normally distributed. What is the best choice for u and...

Question

Question

(6 points) Suppose test scores are normally distributed. What is the best choice for u and o, if the average score is 60 and

Answer 1

Answer #1

mean = 60

for the area of 0.7, z-value is 0.52

using central limit theorem,
x = mean + z*sigma
sigma = (73 - 60)/0.52
sigma = 25

hence, mu = 60 and sigma = 25

Answer 2

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